This reference for pathologists and residents discusses each specific entity with general information, etiology, and epidemiology followed by clinical features, pathologic findings, differential diagnosis, clinical behaviour, and treatment. Updates to the Fifth Edition include revisions to the chapter on Precancerous Lesions of the Cervix in which cytology has been integrated with histology and the role of HPV in cervical cancer screening is discussed in detail, as well as updates to the chapters on Endometrial Carcinoma, Mesenchymal Tumors of the Uterus, Surface Epithelial Tumors of the Ovary, and Gestational Trophoblastic Disease. The chapters on Molecular Biology and Immunohistochemistry have also been extensively revised as these techniques move out of the research laboratory and become incorporated into routine practice.